posted 10-12-2014 11:03 AM ET (US) The propeller that came installed on my 1999 Yamaha 60-HP two-cycle outboard engine is a new aluminum Michigan Twister 13-3/4 x 15. Will this propeller work under normal conditions [on a Boston Whaler 15-foot boat]? The diameter seems large to me, but then I'm not familiar with this engine.--rich

EJO

posted 10-13-2014 11:49 AM ET (US)
Only trial and error will tell.

grosseile88

posted 10-22-2014 11:12 AM ET (US)
Let her rip and see what kind of performance you are getting. I have a 1986 15 SUPER SPORT with a 70-HP Evinrude, and it runs a 13.25 X 17 Stiletto. I am not familiar with your particular propeller. Depending how low the engine is currently mounted on the transom, you can always play around by raising up the engine, which can be fun. Let us know.

tedious

posted 10-24-2014 07:47 AM ET (US)
You'll probably find the aluminum Michigan Twister 13-3/4 x 15 not quite enough pitch, but give it a try. Do you have a tachometer?

Diameter of propellers is largely determined by the gearcase of the motor. If it fits, it's the right diameter; just worry about the pitch.

Tim

Binkster

posted 10-25-2014 05:36 PM ET (US)
It kind of looks like a prop made for a pontoon boat. I'll try it and see how it goes. I hope mt prop guy can add 2" of pitch if it doesn't work. Its a brand new prop---for free. I will have a tach come launch time.